In this ~15 minute video, I show how to inspect the differences between two or three files in a side-by-side comparison. Ediff lets you merge changes from on...
This has nothing to do with the diff program. Ediff is not able to highlight whitespace differences like it highlights non-whitespace differences. Maybe it is possible to do somehow, but by default, whitespace differences generate a diff region with no highlights (or as ediff calls it, refinements).
It is because highlights are done on word level, and whitespaces are not words.
Depends on the configured diff program and its options.
This has nothing to do with the diff program. Ediff is not able to highlight whitespace differences like it highlights non-whitespace differences. Maybe it is possible to do somehow, but by default, whitespace differences generate a diff region with no highlights (or as ediff calls it, refinements).
It is because highlights are done on word level, and whitespaces are not words.